Improvement in machines for manufacturing wood-screws



y Z'Sheets-Shee/I. T. J'. SLOAN.

MACHINE Non MANUFACTURING WooD-scnEWs. No.172,350. Patentednn.18,187e,

2 Sheets-Sheet 2.

T. J. SLOAN. 4 MACHINEFOR MANUFACTURING Woon-scREWs. No.172,350.

Patented Jan. 18, 1876.

hwk/Q www/MWA fw f .Specifcation'forming partof .Letters Patent N o. il 72,350, dated J anuary 18, 187.6;

` May2= 'i,'1575.

i To all whomitrmag/concem: v Be it known that I, THOMASl JQSLOAN; of thek city, county, and Stateof--New York, have I invented certain-ImprovementsinfMachinery for kthe Manufacture AoffWood-Screws, of which Y the usual nick for .f'fgroove, so: that',1by'the use'` of a specially-constructed:driver, the'screw may be turned-or.d-rivenlwithrfar less liability -of the slipping'of thedriver-and of linjury to the screw,and much.4 less need of-care in the adjustment ofthe driver than is required in the use of the common screw. l

My present invention is intended for form'- ing the hereinbefore-mentioned recess, cavity, or indentation in the head of the screwblank after the formation of the latter by'any ofthe Y usual or by any suitable means. To `this end .the invention consists in a novel combination of feeding mechanism, holding-jaws,land1 drill, ltwhereby the blanks, passing automatically from the feeding mechanism -to the holding jaws, arev iirmly held by the latter while sub- -ijected vto.` the-action of thedrill for-forming the recesses in the heads, the vblanks-bein g `r=thus-passe d, in succession, vfto the l`action of .the drill, ande the yrequired recessing ofthe head being-rapidly, cheaply,an'd eifectually .perfb1med.

YI hefinvention also comprises the combination of -a shaving-'cutter-'with the' drill, 'the jaws, andv the feeding mechanism, whereby the. operation of'.shavingpthaheads ofthe. vv'blanks lmay be :performed .in connection with the recessing of the said .headsythereby ena.

bling the heads of my improved-'Lwoodfscremhereinbet'ore mentioned @to 4'be shaped l and iin-` ished ata cost'onlyinfinttesimallygreater than that of the common wood-screws.

Theinvention lalso comprises a novel com? bination of a drill, Vconstructed and arranged yto-have a longitudinal movement additional Y:to its `normal fe ed', with the carrying-fingers Avof a blank-feeding mechanism and the jaws, whereby the drill is made to serve the double function of forcing the blank through the said THOMAS J :SLOAN,` OF NEW YORK, N. Y.

IMPRovEMl-:N't IN-.MACHINEs-FOR. MANUFACTURING,woon-scRE-vs applicationliled ',UOSEB, 'y i.

` fingers into the" jaws, and of drilling the requiredrecess in the headofrtheblank when l the-latter is held vby'thersaid jaws.

-. Figure l lis a plan view of an apparatus Imade-according to my invention. Fig. 2 isa :side elevatioirof the same.` Fig. 3 is a trans- '.versesectionalview in the'fline x of Figs. 1 and 2. Fig. 4' is a detached View, on a larger scale, of -certain parts `of the machine; and

lFigs--is a central longitudinal view of the' screw-in the manufacture of which my present invention isto beused.

use for shaving the heads of'sc'rew-blanks5'. and such jaws being thus well known inthe manufacture of woodscrews, no specific or detailed description of them is considered necessary in this connection.' B is a channel or passage-Way, through which the screwblanks pass downward, in a horizontal position, to a carrier, C, inwhicli is a transverse groove, a, ofsuch size and'proportions as to receive a blank fromk the channel B when brought coincident vwith the open lower end thereof.

The carrier rests lupon a guide,b,' which sustains itin proper vrelation with the channel, and receives a longitudinal movement through arod, c,- ffrom a pendulum-arm, d, which is swung in one direction bythe action of a cam, e,on a'drivingshaft, l), and in the other by a spring, f, applied at its upper end or point of suspension. The carrier'isfnotched -or` slotted at its front edge, as shown at a in .Fig.1, the ksaidnotchor slot dlcrossing the lgroove a. E are spring-fingers, projecting downward'from the upper. arm of an y.elbowlever, F, thelower arm vof which receivesl a vibrating motionfrom'acam, g, on the driving-shaft, a spring, m, applied to the elbow- :lever at its pivot orpoint of suspension, keeping the vaforesaid lower arm thereof in due andlproper .contact with the earn g.

The channel B is supplied from a hopper in a manner well understood inthe manufacture of wood-screws, the channel B, carrier C, and spring-fingers E ybeing devices well` `known and applied in screw manufacture for con Ais a spindle, 'and B* a pair of holding' hohl the blank aforesaid.

ducting screw-blanks in succession to holdingjaws in the operations of nicking and shaving the heads of the blanks, and also in apparatus for threading the screws.

Tile operation of the devices is substantially as follows: The outward movement of the carrier C brings its groove a under the open bottom of the channel B, whereupon a blank from the latter drops into the said groove, and the reverse movement of the carrier brings it beneath the spring-fingers E, which then descend and grasp it. Meanwhile the jaws B* have been opened by suitable and wellknown accessory mechanism. The spring-fingers E then bring the blank immediately in front of the jaws, and the forward movement (hereinafter.described) of the -drill G'slides the blank through the fingers into or between the jaws, with the head of the blank projecting a requisite distance beyond the front of the said jaws,v and the fingers E then retiringto their original position. The jaws are then automatically` closed to gripe and with its head projecting, as

The feeding mechanism just described is efficient, and as such may be used as one of `the essential elements of my novel combinations; but any other usual or suitable devices j for feeding the blanks in succession to the holding-jaws may be used in lieu thereof.

It is to .be understood that the spindle A, and, consequently, the jaws Bl, is capable of rotation by meansof a belt and pulley or other suitable appliances applied to the shaft, and moving in due unison with the feeding mechanism, to receive the blanks in succession from the latter. v

G is a drill, arranged in the axial line of the jaws B*, incapable of rotation, but capable of rectilinear movement in its bearings b',

. which is provided upon the adjacent portion ofthe supporting-frame of the machine. The longitudinal movement of the drill is received from an upwardly-projecting arm, a, of a rock shaft, I, a lower arm, b", of which is actuated by a cam, Ji, on the4 driving-shaft; the said cam J l being of such configuration that, after having caused the arm b" to actuate the drill in forcing the screws or blanks to the jaws, as hereinafter fully set forth, it further causes the arm to give a normal feed to the drill, to

" drill the desired 'cavities in the heads of said screws or blanks while they are heldin the jaws. The arm a is connected with the outer end of the drill by a connecting-rod, n.

rlhe blank havingjbeen griped by the jaws B*, as hereinbefore explained, and the said jaws being rotated as in the ordinary shaving of the heads, the further inward movement j. or normal feed 7 of the drill (the cutting end of which latter of course corresponds in size and shape to the recess or cavity to be formed` in the head of the blank) causes the said drill to come in cutting or drilling contact with the cess, cavity, or indentation required, thedrill J is the shaving-cutter, arranged as in the usual relation with the jaws that hold the blanks, and with the feeding mechanism that conducts the blanks to the said jaws, and also in such relation to the drill G that while the latter is drilling the recess in the center of the head the cutter is engaged in shaving the remaining portions of the same, the movement of the drill being so controlled that the drill recedes slightly just as the cutter approaches the edge of the recess formed by the drill, by which means the head is shaved clear to the said recess. i l

rlhe shaving-cutter is of the usual kind and configuration, and is carried on an arm ofa rock-shaft, A', connected by a rod, ai, with an arm of a second rock-shaft, B', a long arm, c', of which extends to an actuating-cam, k, on the driving-shaft f', being a spiral spring on the rock-shaft 1A', arranged `to cause, `by its tension, the `outward movement of the shaving-cutter after the completion of shaving operation herein just described.

i N is the usual back-rest, l)rovided to support the blank against the pressure of the cutter, and actuated by a cam, g', on the drivingshaft, the said cam acting on an arm, n,of the rock-shaft r, which carries the said backrest.

lt will be seen that, the formation of the recess or cavity in the head of the blank being simultaneous with the shaving of said head, no appreciable increase of expense and no loss of time are involved in the production of my improved serew,hereinbefore referred to, as compared with the manufacture of the common wood-screw.

It should be understood that, if it be desired to only form the recesses inthe heads ofthe blanks irrespective of the shaving of the said heads, the shaving-cutter maybe dispensed with, and also that, so far as concerns the formation of the aforesaid recesses in the heads of the blanks, the same result would be achieved by the use, as equivalents ofthe construction hereinbefore described, of non-rotative jaws and rotating drill, and that, if desired, the parts may be so made and arranged that, instead of moving the drill to and from the blank, the latter may be moved to and from thedri-ll. i z

What I claim as my inventionisi l. In a machine for recessing the heads of screw-blanks, the combination of a feeding mechanism, holding-jaws and drill, substantially as and for the purpose set forth.

2. The combination of a shaving-cutter with a feeding mechanism,holding-jaws, and drill,

y substantially as and for Athe purposerset forth.

3. In a machine for recessing 4the heads of screw-blanks, the drill constructed and arranged to have a longitudinal movement irresaid blank is held by the jaws, substantially speetive of its normal feed, in combination as herein set forth. with the ngers E of the blank-feeding mechanisn and the jaws Bl, whereby the said drill THOS. J. SLOAN. is made to serve the double purpose of forc- Witnesses: ing the blank through the lingers to the jaws W. M. EDWARDS,

and recessing the head of the blank when the JAMES .A WHITNEY. 

